Roja Singh

1.2k total citations · 2 hit papers
25 papers, 924 citations indexed

About

Roja Singh is a scholar working on Electrical and Electronic Engineering, Materials Chemistry and Polymers and Plastics. According to data from OpenAlex, Roja Singh has authored 25 papers receiving a total of 924 indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Electrical and Electronic Engineering, 16 papers in Materials Chemistry and 9 papers in Polymers and Plastics. Recurrent topics in Roja Singh's work include Perovskite Materials and Applications (22 papers), Quantum Dots Synthesis And Properties (13 papers) and Chalcogenide Semiconductor Thin Films (12 papers). Roja Singh is often cited by papers focused on Perovskite Materials and Applications (22 papers), Quantum Dots Synthesis And Properties (13 papers) and Chalcogenide Semiconductor Thin Films (12 papers). Roja Singh collaborates with scholars based in Germany, India and Australia. Roja Singh's co-authors include Ulrich W. Paetzold, Bahram Abdollahi Nejand, Fabian Schackmar, Thomas Feeney, Paul Faßl, Ihteaz M. Hossain, Saba Gharibzadeh, Felix Laufer, Uli Lemmer and Hang Hu and has published in prestigious journals such as Nature Communications, SHILAP Revista de lepidopterología and Energy & Environmental Science.

In The Last Decade

Roja Singh

23 papers receiving 903 citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Two birds with one stone: dual grain-boundary and interface passivation enables >22% efficient inverted methylammonium-free perovskite solar cells

2021 237 citations Saba Gharibzadeh, Paul Faßl et al. Energy & Environmental Science profile →
Evaporated Self‐Assembled Monolayer Hole Transport Layers: Lossless Interfaces in p‐i‐n Perovskite Solar Cells

2023 165 citations Ahmed Farag, Thomas Feeney et al. Advanced Energy Materials profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Roja Singh Germany	13	875	509	365	39	32	25	924
Thomas Feeney Germany	14	1.0k 1.2×	580 1.1×	369 1.0×	33 0.8×	47 1.5×	24	1.0k
Simone Meroni United Kingdom	16	691 0.8×	391 0.8×	352 1.0×	44 1.1×	12 0.4×	26	749
Enrico Lamanna Italy	11	741 0.8×	389 0.8×	374 1.0×	44 1.1×	21 0.7×	16	781
Kyung Mun Yeom South Korea	11	956 1.1×	568 1.1×	493 1.4×	36 0.9×	28 0.9×	13	991
Hehe Huang China	15	629 0.7×	455 0.9×	236 0.6×	51 1.3×	24 0.8×	32	667
Somayeh Moghadamzadeh Germany	14	1.3k 1.4×	759 1.5×	576 1.6×	39 1.0×	38 1.2×	24	1.3k
Karthick Sekar France	13	826 0.9×	524 1.0×	264 0.7×	25 0.6×	39 1.2×	36	890
Luigi Angelo Castriotta Italy	20	983 1.1×	516 1.0×	486 1.3×	42 1.1×	25 0.8×	48	1.0k
Kiran Ghimire United States	11	809 0.9×	508 1.0×	353 1.0×	21 0.5×	44 1.4×	23	857

Countries citing papers authored by Roja Singh

Since Specialization

Citations

This map shows the geographic impact of Roja Singh's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Roja Singh with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Roja Singh more than expected).

Fields of papers citing papers by Roja Singh

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Roja Singh. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Roja Singh. The network helps show where Roja Singh may publish in the future.

Co-authorship network of co-authors of Roja Singh

This figure shows the co-authorship network connecting the top 25 collaborators of Roja Singh. A scholar is included among the top collaborators of Roja Singh based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Roja Singh. Roja Singh is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Diercks, Alexander, Thomas Feeney, Roja Singh, et al.. (2025). Sequential Evaporation of Inverted FAPbI₃ Perovskite Solar Cells – Impact of Substrate on Crystallization and Film Formation. ACS Energy Letters. 10(3). 1165–1173. 15 indexed citations

Zhao, Tonghan, et al.. (2025). Accumulated Structural Evolution under Diurnal Cycling Degrades Wide-Bandgap Perovskite Solar Cells. ACS Energy Letters. 10(10). 4740–4748.

Feeney, Thomas, Felix Laufer, Roja Singh, et al.. (2025). High‐Rate FA‐Based Co‐Evaporated Perovskites: Understanding Rate Limitations and Practical Considerations to Overcome Their Impact. Advanced Functional Materials. 36(16). 1 indexed citations

Hu, Hang, Ting Pan, Roja Singh, Bahram Abdollahi Nejand, & Ulrich W. Paetzold. (2025). Laminated Two-Terminal All-Perovskite Tandem Solar Cells with Transparent Conductive Adhesives. ACS Applied Materials & Interfaces. 17(5). 7804–7810. 2 indexed citations

Singh, Roja, et al.. (2025). Versatile Two‐Step Process for Perovskite‐Based Tandem Photovoltaics. Solar RRL. 9(13). 1 indexed citations

Singh, Roja, Hang Hu, Thomas Feeney, et al.. (2024). Danger in the Dark: Stability of Perovskite Solar Cells with Varied Stoichiometries and Morphologies Stressed at Various Conditions. ACS Applied Materials & Interfaces. 16(21). 27450–27462. 12 indexed citations

Jin, Qihao, Hang Hu, Junchi Chen, et al.. (2024). Inkjet-printed optical interference filters. Nature Communications. 15(1). 3372–3372. 11 indexed citations

Laufer, Felix, et al.. (2024). Repeatable Perovskite Solar Cells through Fully Automated Spin-Coating and Quenching. ACS Applied Materials & Interfaces. 16(40). 54007–54016. 8 indexed citations

Hu, Hang, Yang Li, Roja Singh, et al.. (2024). Triple-junction perovskite–perovskite–silicon solar cells with power conversion efficiency of 24.4%. Energy & Environmental Science. 17(8). 2800–2814. 36 indexed citations

10.

Hu, Hang, David B. Ritzer, Alexander Diercks, et al.. (2023). Void-free buried interface for scalable processing of p-i-n-based FAPbI3 perovskite solar modules. Joule. 7(7). 1574–1592. 40 indexed citations

11.

Farag, Ahmed, Thomas Feeney, Ihteaz M. Hossain, et al.. (2023). Evaporated Self‐Assembled Monolayer Hole Transport Layers: Lossless Interfaces in p‐i‐n Perovskite Solar Cells. Advanced Energy Materials. 13(8). 165 indexed citations breakdown →

12.

Nejand, Bahram Abdollahi, David B. Ritzer, Hang Hu, et al.. (2022). Scalable two-terminal all-perovskite tandem solar modules with a 19.1% efficiency. Nature Energy. 7(7). 620–630. 118 indexed citations

13.

Ruiz‐Preciado, Marco A., Fabrizio Gota, Paul Faßl, et al.. (2022). Monolithic Two-Terminal Perovskite/CIS Tandem Solar Cells with Efficiency Approaching 25%. ACS Energy Letters. 7(7). 2273–2281. 83 indexed citations

14.

Schackmar, Fabian, Felix Laufer, Roja Singh, et al.. (2022). In Situ Process Monitoring and Multichannel Imaging for Vacuum‐Assisted Growth Control of Inkjet‐Printed and Blade‐Coated Perovskite Thin‐Films. Advanced Materials Technologies. 8(5). 12 indexed citations

15.

Feeney, Thomas, Ihteaz M. Hossain, Saba Gharibzadeh, et al.. (2022). Four‐Terminal Perovskite/Copper Indium Gallium Selenide Tandem Solar Cells: Unveiling the Path to >27% in Power Conversion Efficiency. Solar RRL. 6(12). 26 indexed citations

16.

Singh, Roja, Eduard Madirov, Dmitry Busko, et al.. (2021). Harvesting Sub-bandgap Photons via Upconversion for Perovskite Solar Cells. ACS Applied Materials & Interfaces. 13(46). 54874–54883. 30 indexed citations

17.

Gharibzadeh, Saba, Paul Faßl, Ihteaz M. Hossain, et al.. (2021). Two birds with one stone: dual grain-boundary and interface passivation enables >22% efficient inverted methylammonium-free perovskite solar cells. Energy & Environmental Science. 14(11). 5875–5893. 237 indexed citations breakdown →

18.

Singh, Roja. (2021). Caste, Gender and Fire in Maadathy: an Unconventional Fairy Tale. SHILAP Revista de lepidopterología. 2(2). 407–410.

19.

Ghosh, Sudeshna, Roja Singh, Anand S. Subbiah, et al.. (2020). Enhanced operational stability through interfacial modification by active encapsulation of perovskite solar cells. Applied Physics Letters. 116(11). 18 indexed citations

20.

Johari, Rahul, Bhaskar Bhattacharya, Pramod K. Singh, Roja Singh, & Zishan H. Khan. (2016). Perovskite sensitized solar cell using solid polymer electrolyte. International Journal of Hydrogen Energy. 41(4). 2847–2852. 32 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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